/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.transforms;



import com.bff.gaia.unified.sdk.expansion.ExternalTransformRegistrar;

import com.bff.gaia.unified.sdk.values.PInput;

import com.bff.gaia.unified.sdk.values.POutput;



/**

 * An interface for building a transform from an externally provided configuration.

 *

 * <p>Classes which implement this interface will be instantiated externally and require a zero-args

 * constructor. The {@code buildExternal} method will be called with the configuration object as a

 * parameter.

 *

 * <p>This builder needs to be registered alongside with a URN through {@link

 * ExternalTransformRegistrar}. Note that the configuration requires setters for all configuration

 * parameters, e.g. if there is a parameter "start", there should be a corresponding setter

 * "setStart".

 *

 * @param <ConfigT> A configuration object which will be populated with the external configuration.

 * @param <InputT> The input type of the externally configured PTransform.

 * @param <OutputT> The output type of the externally configured PTransform.

 */

public interface ExternalTransformBuilder<ConfigT, InputT extends PInput, OutputT extends POutput> {



  /** Builds the transform after it has been configured. */

  PTransform<InputT, OutputT> buildExternal(ConfigT configuration);

}